Improvement in sash-pullets



" To all whom "it may concern.-

t@ flifytlliw.;

l ,l CHARLFISVB. CLARK, OF" BUFFALO, YORK.` Y

' i Letters Patent No. 94,945, drted September 21, 1869. l

IMPROVEMENT In sAsH-PULLEYS.

The 'Schedule referred to in these Lettexsratent and making part of thesame.

Beit knownthat -I, `CHARLES B. CLARK, 'of the city of Bualo, county ofErie, and State :ofvNew York, have invented a new and useful Improvement`in Window-Sash Pulleys; and I do hereby declare' the following to be afull and exact descriptionthereof, reference being made to the'accompanying drawings, making part `of this specification, in which-Figure I is a plan, with the Vcap and wheel removed. A.. M l 'Figure IIis a similar view,`with the wheelin posion. Y

Figure`III is a plan of` the pulley complete.

Figure IV is a side 'elevatioin with the cap or case ieznoved.

Figure V is a central longitudinal section of Fig. 1V.

Figure VIv is a transverse section in line Y Y.

Figure VII is a side elevation ofthe pulley complete.

Figure VIII is a longitudinal section of the easei portion in line Z Z.Y

'Like letters of reference designate like partsin each of the figures.'i

My improvement belongsito that class of .axle-pulleys, the frame orcaseof which is divided into two parts, the division extending theA lengthofthe base and through or near the axle-bearing; and

The improvement consists in providing one part of the case withprojecting disks or flanges, which slide into corresponding recesses inthe other part, when, the pulley is complete.

The object of my invention is toform an axle-pulley that canpbe easilycast, and readily put together,

as shown in Figs. II,`IV, and VI.

The case E is also provided with semicircular, b earr ings, L Lwhich,when the pulley is together, enclose .the journals D D, of the Wheel I.

i The case E is further provided with disklike Aprojections, A A,as seenin Figs. VI, VII, and VIII.

These ear-like projections overlap the corresponding portions B4B, ofthe upper edge ofthe flanges K of the base F. l l

The thickness of theseV flanges may be increased around the recessedportions B, as shown at J J, so as'to beiush with the face. of the earsA.

. The ends ofthe base-part F have countersinks, G

G, to receive the heads of screws by which the pulley is secured to theframe.

. These countersinksare deepened h'y circular anges, as seen at G G,which extend through apertures, H H, in the ends of the case E.

The case Eand base F are held together by the friction fof the ,disks AA against the face of the recesses B B, which friction is'eiected bysimply pressin g the case E over the base-portion F. By slightlynarrowing the distance between the disks A A, the

sides of the casel E' ivill yield enough to make the adhesion of ltheparts very lil-m.

The disks AA A may be cast on the baseportion F,

but are preferably cast on the case.

The axle-bearings can also beV made` wholly .either -in the base orcaseportion of the' pulley. Y

I am aware that axlepulleys` are in use having the case divided intotwol parts, at ornear the bearing of the axle. Butso Vfar as I know,they are all cast loosely, and the parts will not, unless riveted, holdtogether before being adjusted to the lframe. This is greatinconvenience' to builders, and riveted vpulleys are in consequencepreferred.

My method remedies this objection, and lI am enabled to produce acompact, light, and durable article,

equal to any, and inuch cheaper thanthe drilled-' andriveted variety.Besides, the castings of each size will all'interchange, being cast soas to require no tting or finishing. This is an essential feature, asany part broken by accident or otherwise can be readily replaced, andonly the broken part lost.

In pulleys with ,double base, the plates are required to be thin, sothat-together, they willnot be so .thick as to mortise too deeply in theframel Countersinks made in these plates are so shallowas to require acertain-sized 'scre`w-head. 'I f too large ahead, it

will protrude so as to interfere with 'alle working of the sash; and iftoo small a head, it will pass through the countersink. Y

I obviate this difficulty by making, the countersinks `vthe depth ofboth plates combined, allowing a great range of screws to be used, whileI strengthen the outer. plate and prevent its liability to break.

I do not claim, broadly, dividing the case of an axlepulley into two ormore parts, .as I am aware that .this is not new; but 'i What I claim asnew, and desire to secure by Letters Patent, is'-- The overlapping earsA A of the cap, combined and operating withA the corresponding portionsB B of the base-portion, Substantially as set `forth.

' Witnesses: CHARLES B. CLARK.

E. G.CLARK, 1 C. I-I. GAMER.

